Reporter: Overnight, a sloppy, snowy mess across the chicago area. On the roads, spinout after spinout. Some drivers had to be rescued out of ditches. It's scary. The wife's in the car. Having little panic attacks. It's bad. It's really bad. Reporter: The winter wallop whacking more than 20 states. In colorado, treacherous roads, leaving 60 middle school students stranded overnight, at a school east of colorado springs. Oklahoma is also struggling. 50-mile-per-hour to 60-mile-per-hour winds and four-foot snowdrifts. Trapping motorists and plow trucks on highways. Unbelievable amount of snow here. Reporter: In north carolina, downed trees snapped ice-coated power lines, creating a fire and leaving thousands in the dark. Kansas city, digging out once again. And the heavy, wet snow, bringing down old trees. And creating a new danger, roof collapses. One man was killed after a roof buckled in oklahoma. In belton, missouri, a family narrowly made it out, after this wall came crashing down. It was like a big, huge salad bowl. That's when I realized, we have to get out. Reporter: Two hours west, in missouri's capital, jefferson city, the entire ceiling and front wall of this warehouse, destroyed. Here at o'hare and at many airports, it will be a day of catchu and also a busy day of digging out across the path of this storm.

This transcript has been automatically generated and may not be 100% accurate.

An extreme storm stretching from Arizona to Illinois brings snow and ice.

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